3. Keep Secrets Server-Side API keys, tokens, and database URLs in client-side code, localStorage, or cookies are basically public. Anyone c…

3. Keep Secrets Server-Side API keys, tokens, and database URLs in client-side code, localStorage, or cookies are basically public. Anyone can open dev tools and grab them. Use Replit Secrets to store anything sensitive server-side, where your app can access it but users can't. If a key ever does end up in the browser, rotate it immediately. Treat any exposed secret as already compromised. Media

Source: Replit (X) | 2026-05-28